Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Vertcal\s+Dipole\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Vertcal\s+Dipole\s*$/: 14 ]

Total 14 documents matching your query.

1. [TowerTalk] Vertcal Dipole (score: 1): Author: K0PYK <k0pyk@yahoo.com>; Date: Sun, 17 Oct 2004 03:28:38 -0700 (PDT); Tower Talk'ers, Has any made a vertical dipole (lets say for 20 meters) where it is end fed with coax. I will try and explain my thoughts; * top half of radiator, i.e., 1/2 of dipole is a single 14 g; /archives//html/Towertalk/2004-10/msg00440.html (7,525 bytes)
2. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: K0PYK <k0pyk@yahoo.com>; Date: Sun, 17 Oct 2004 05:24:29 -0700 (PDT); Pete, Thanks for the reply. I will try and draw a picture. -- 1/4 wl --*-- 14 guage top half --*--*-- Coax Feed -- 1/4 wl Coax for bottom half of vert dipole braid of bottom half. coax for bottom hal; /archives//html/Towertalk/2004-10/msg00443.html (8,553 bytes)
3. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sun, 17 Oct 2004 05:46:43 -0700; One of the antenna compediums has a 4 element vertical phased array for 80(?) that used loaded center fed vertical dipoles. They ran coax up the tube. The tricky thing about what you propose is feedi; /archives//html/Towertalk/2004-10/msg00445.html (9,169 bytes)
4. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: "Kelly Taylor" <ve4xt@mb.sympatico.ca>; Date: Sun, 17 Oct 2004 08:18:59 -0500; There is in the ARRL handbook a design for an end-fed dipole just like Tom suggests. It was oriented horizontally, but I see no reason why vertical orientation wouldn't work. The antenna was made of; /archives//html/Towertalk/2004-10/msg00447.html (10,798 bytes)
5. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sun, 17 Oct 2004 06:45:32 -0700; Of course! You don't really need triax or twinax..(too early, and the coffee hasn't taken effect yet) I forgot, the inside and the outside of the coax are actually different conductors for RF. The cu; /archives//html/Towertalk/2004-10/msg00448.html (14,871 bytes)
6. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 17 Oct 2004 12:08:17 -0400; dipole just like Tom reason why vertical While the Handbooks are generally pretty good, once in a while some marginal stuff creeps in. The problem is always sorting good ideas from bad ideas. stripp; /archives//html/Towertalk/2004-10/msg00453.html (13,750 bytes)
7. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 17 Oct 2004 12:30:35 -0400; Tom, Why not make a trap at the bottom out of coax??? Use a 1/2 wl of coax as the radiator with the shield cut 1/4 wl back from the open end. Tie the shield and center together at the ends of the ou; /archives//html/Towertalk/2004-10/msg00455.html (8,915 bytes)
8. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: "Tower (K8RI)" <tower@rogerhalstead.com>; Date: Sun, 17 Oct 2004 13:05:34 -0400; K0PYK wrote: Tower Talk'ers, Has any made a vertical dipole (lets say for 20 meters) where it is end fed with coax. I will try and explain my thoughts; Yes, but it was quite some time ago. When using; /archives//html/Towertalk/2004-10/msg00458.html (10,932 bytes)
9. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 17 Oct 2004 14:55:51 -0400; You have to as the braid 1/4 wave stub used due to 20 meters and Roger, The Isopole open sleeve has a high open-end impedance. That impedance does the isolation. When the dielectric inside is mostly; /archives//html/Towertalk/2004-10/msg00460.html (9,201 bytes)
10. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Sun, 17 Oct 2004 16:10:30 -0400; meters) where it is end fed with coax. Yes but why not use a simple LC matching circuit? The following circuits work best with a single 1/4 wl radial counterpoise in addition to the 1/2 wl radiator:; /archives//html/Towertalk/2004-10/msg00461.html (9,967 bytes)
11. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sun, 17 Oct 2004 17:13:52 -0400; We shouldn't mistake that for a good system. The only reason you get away with it is you are running QRP, or have a lucky feedline length. It is impossible to end-feed a half wave antenna without ha; /archives//html/Towertalk/2004-10/msg00465.html (9,216 bytes)
12. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Sun, 17 Oct 2004 21:27:52 -0400; you get away with it is you are running QRP, or have a lucky feedline length. Par's monoband End Fedz are rated at "a conservative 100W" although the distributor (Universal Radio) says "a conservativ; /archives//html/Towertalk/2004-10/msg00470.html (11,268 bytes)
13. Re: [TowerTalk] Vertcal Dipole (score: 1): Author: gdaught6@stanford.edu; Date: Sun, 17 Oct 2004 20:10:28 -0700; Isn't everything? What I mean is, isn't that the definition of resonance in this sort of application? Or is there another definition I should know? 73, George T. Daughters, K6GT _____________________; /archives//html/Towertalk/2004-10/msg00480.html (8,378 bytes)
14. [TowerTalk] Vertcal Dipole (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Mon, 18 Oct 2004 06:07:33 -0400; K6GT wrote: Isn't everything? What I mean is, isn't that the definition of resonance in this sort of application? Or is there another definition I should know? At resonance, X is not necessarily zer; /archives//html/Towertalk/2004-10/msg00485.html (8,915 bytes)

Current List: 1 - 14
Page: [1]